Pitman for pneumatic motors



July 24, 1928. A

` F. VOLARE PITMAN FOR PNEUMATIO MOTORS Original Filed Oct. 26, 1923 a ATTOENY Patented July 24, 1928.

Unirse sfrerss 1,677,908 PATENT orrlca,-

FRED VOLARE, OF SCOTCH PLAINS, NEW JRSEY, ASSIGNOR TO THE AEOLIAN COM- PANY, A CORFORATION OF CONNECTICUT.

PITMAN FOR '.PNEUMATIC MOTORS.

Original application filed October 26, 1823, Serial No. 670,887. Divided and this( application led June 11,`

My present invention relates to improvements in pitmen for pneumatic motors, includingmotors for automatic musical instruments such as pianos and organs, this being a division of my United States Patent No. 1,613,146, issued Jan. 4, 1927, entitled Improvements in pneumatic motors.

The object and nature of my invention is a pitman which is entirely effective for its purpose and at the same time is simple to manufacture and assemble with the parts of the motor which it operatively connects.

The drawings show a pneumatic motor embodying my improvements in their preferred form. In said drawings, Fig. 1 is a face view of said motor; Fig. 2 is a combined vertical section and end view on the line 2 2 in Fig. l looking in the direction of the arrows; Fig. 3 is a longitudinal sectional view on a larger scale of one of the pitmen detached, said section being taken on the line 3-3 in Fig. 4 looking in the direction of the arrows; and Fig. 4 is aplan vievv of the same pitman looking down upon it in Fig. 3.

Before describing my improvements, it will be merely necessary to say by Way of preface as to the pneumatic motor proper to which my improvements are applied, that it may be of any usual or preferred construction, the specific type shown in the drawings being merely one of the numerous kinds of pneumatic motors to which my improvements are applicable. For this reason, no detailed description of the pneumatic motor proper is necessary, it being sufficient to point out that 1 designates the motor pneumatics; 2 their slide valves; 3 thecrank shaft providedwith the sprocket Wheel 4 for delivering the power developed by the motor to the drive mechanism; and 5 5 are brackets for supporting the motor in the vertical position shown inside the automatic musical instrument in operative relation with the music-roll and take-up spool mechanism thereof.

The means for operatively supporting the slide valves 2 consists of metal staples 6 driven into the back of the motor with their legs at the sides of the valves and With the upper portion of said staples bent so as to overlie the exposed face of the valves.

Each valve has a metal piece secured there-to consisting of a round cross-sectional Serial No. 115,259.

part 7 extending transversely adjacent the exposed face of the valve and supported .in that position by the legs 7 which are preferably flattened so as to be rigidly securable by the screws 8 to the side edges of the valve between the legs of the previously described guide staples 6.

There are six pitmenwithin my invention shown in Fig. l, of which three are longer than the others but are otherwise the same in construction. The three long pitmen 9 are shown operatively connecting the motor crank shaft with the l several valves 2, Whereas the short pitmen 9a connect said crank shaft With the several pneumatics 1. Since, apart from length, thereis no dierence between the pitmen 9 and 9a, the following description and reference numerals apply equally to both. Each pitman consists of a strip of springy or resilient metal, preferably spring steel, provided with bentup, substantially U-shaped ends 9h. The latter are of such size and shape that they can be sprung over the crank .shaft 3 and over the above described round cross-sectioned part 7 of the valves, as shown at 9 and 9b in Figs. 1 and 2, the resilience of the sides of said U-shaped ends serving to operatively retain the pitmen in position.

To make a better, noiseless bearing, each U-shaped end is lined With a sound-deadening material such as felt, in the form preferably of a strip 10 of such material secured by its ends under the clamping lugs 9c and 9d which latter are located adjacent the mouth of each U-shaped end and are preferably formed integral with the pitman. Thus, the lugs 9c consist of the extremities of the pitman beyond the U-shaped ends bent back so as to grip the material 10, as best shown in Fig. 3, between the said lugs 9C and the outside of the U-shaped ends 9. On the other hand, the lugs 9*l are stamped up from the body portion of the pitman adjacent the U-shaped ends so as to receive under them the material 10 and to clamp saine against said body portion of the pitman.

From the foregoing. it will be evident how easily the pitmen can be assembled to connect the crank shaft with the valves by merely snapping the resilient U-shaped ends of the pitmen over said crank shaft and the part 7 of the respective valves. Similarly,

they can be disassembled by prying` or forcing their U-shaped ends off the parts with Which they are engaged.

The kpit-ndenl 9: thatcon-nect the crank shaft and the power pneuinatics l are siinilariy adapted to be snapped into and out of operative position exactly as above. describedi in connection with the longer pitnuen 9, the movable boardsof the power pneumatics beingeach provided with a round1 cross-sectioned metal part 1l adapted to'be received into and"y retainedl by the Ushaped' end of the pit-man, said part 11 beingv in turn supportedby legs 11a, which latter are pref-erab-ly flattened. as best. shown in Fig. 2 so as to be rigidly securabl'e by the screws 12 to the niovable board ofthe niotor pneuniatics.

Of course, modifications and changes may be inad'e inl` the above preferred embodiment of my invention which Will' still be Within the scope and spirit ofthe foregoing` d`is. closure and" Within the scope and spirit of the annexed claims, which as such are in* tended' to be covered thereby.v

What 'claim is:

1;. A pitinan for connecting` the crank shaftof a pneumatic motor with an clonga'ted round cross-sectioned part on therelatedslide valve of said; inotor, said pitinan consisting of a strip of spring-metal provided? with bent-up, substantially UL-shaped ends Whose sides extend transversely to the body portion. of said strip, said U-shaped;

ends beingd adapt-ed, in size and shape to be sprung;A over the crank shaft and said round` Lernens cross-sectioned part and* to be retained in Y place thereon by the resilience ofthe sides of said U-shaped ends.

2, A` pitinan for` conneciting* the crank shaft of, a pneumatic inotor with an elongated round cross-sectioned part on the related'. slide valve of said motor, said pitnian consisting` ofa strip of spring-metal provided with bent-up, substantially U-shaiped ends, thel latter adapted in size and shape to be sprung over the crankshaft and said round. cross-seotioned part.v and' to be retained in place thereon by the resilience of the sides of said ilil-shaped ends, and soundd'eadening' materialr lining said' Ushaped` ends. Y

3. A pitma-n for connecting the. crmanl; shaft of a pneuniatie motor with an clone gated round cross-sectioned part on the related slide valve of said` inotor, said pitnian consisting of a strip of spring-metal pro-k vided With bent-up; 'substantially U-shaped ends, the latter adapted in size andi shape to be' sprung over the crank shaft and said round' cross-sectioned part and'. to beretained in place thereon by the resiliencevof the sides of` said U-shaped ends, soundi-deadening` materiallining said tlf-shapedy ends, and clanipino` lugsl on saidy pitnian adjacent the mouth or said lil-shaped ends engaging said lining materiala In 4testimony whereof I have signed; niy naine tol this speciication this 15th day of May, 1926. a

FRED VGLARE 

